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Optical Engineering

Modeling of a compact and completely non-blocking 4 × 4 multimode interference switch for optical communication applications
Author(s): Ghanshyam K. Singh; Abhishek Goyal; Rajendra Prasad Yadav; Vijay Janyani
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Paper Abstract

Modelling of a compact and completely non-blocking 4×4 optical switch utilizing integrated multi-mode interference (MMI) waveguides with a channel profile of Ti-indiffused Lithium Niobate is described. Design novelty lies in its satisfactory operation for two wide optical windows (100 nm each), with center wavelengths (λcentre) of 1.3 and 1.55 µm, possessing low losses. For either of these windows, the average value of propagation losses are maintained lower than 1 dB with a vacillation of extremely low polarization dependent losses ( ≤ 0.15 dB). Index tuned regions are optimized to achieve average crosstalk levels better than -19 and -12 dB for its operation in the wavelength range of 1.25 to 1.35 µm and 1.50 to 1.60 µm, respectively. It is also observed that switch possess absolute loss uniformity (of the range of 0.5% to 1.6%) with a maximum of ±2.5% tolerance in the structural parameters.

Paper Details

Date Published: 4 May 2012
PDF: 8 pages
Opt. Eng. 51(5) 055002 doi: 10.1117/1.OE.51.5.055002
Published in: Optical Engineering Volume 51, Issue 5
Show Author Affiliations
Ghanshyam K. Singh, Malaviya National Institute of Technology (India)
Abhishek Goyal, Malaviya National Institute of Technology (India)
Rajendra Prasad Yadav, Malaviya National Institute of Technology (India)
Vijay Janyani, Malaviya National Institute of Technology (India)


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